.nav-dropdown ul {
    display: none;
    width: 150px;
    position: absolute;
    right: -8px;
    top: 100%;
    padding: 0;
    margin: 0;
    list-style-type: none;
    background: #182648;
}
.nav-dropdown.nav-open ul {
    display: block;
}
.nav-dropdown ul li {
    display: block;
    font-size: 15px;
    position: relative;
}
.nav-dropdown ul li:after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    right: auto;
    top: auto;
    height: 1px;
    width: 100%;
    background-color: #4f5974;
    display: block;
    z-index: 15;
    -webkit-transform-origin: 50% 100%;
    transform-origin: 50% 100%;
}
.nav-dropdown .tab-link {
    display: block;
    padding: 2px 15px;
}
.nav-dropdown i.icon {
    display: inline-block;
}
.nav-dropdown i.icon + span {
    padding-left: 5px;
}


.icon-menu-work {
    width: 20px;
    height: 30px;
    background-image: url("../image/icon-handle.png");
}
.icon-menu-content {
    width: 20px;
    height: 30px;
    background-image: url("../image/icon-text.png");
}
.icon-menu-attachment {
    width: 20px;
    height: 30px;
    background-image: url("../image/icon-attach.png");
}
.icon-menu-flow {
    width: 20px;
    height: 30px;
    background-image: url("../image/icon-flow.png");
}